Freezing-can



' A; J. BENTLEY.

FREEZING CAN.

Patented Dec. 6, 1921.

UNITED STATES.

PATENT orr ca- ANSON J. BENTLEY,- or NILES, 01110.

FREEZING-CAN".

Application filed May 16,

To all whom it may concern:

Be it known that I, ANsoN J. BENTLEY, a citizen of the United States, and a resident of the city of Niles, in the county of Trum bull and State of Ohio, have invented an Improvement in Freezing-Cans, of which the following is a specification.

The present invention relates to improvements in freezing cans used in the manufacture of ice by what is commonly called the raw water can system, and particularly to an improved construction of the 1 air tube commonly used in such freezing cans.

In the manufacture of ice by the raw water system, each freezing can is usually provided with some means for admitting air to the interior of the can at or near the bottom so that, when the can is filled with'water and immersed in a suitable freezing solution, such as in the brine tank of the usual ice making plant, air will bubble up through the water which is to be frozen and thoroughly agitate the same. The action of this stream of air is such that a clear cake of ice is formed in the can and any impurities present in the water are not frozen into the ice but are collected in the small amount of water which remains unfrozen at the termination of the freezing period.

Several constructions have been suggested and used by which the stream of air may be admitted to the interior of the can. Inasmuch as the cans are usually immersed in a brine solution and are themselves filled with water, it is usually convenient to have some sort of a fixture at the top of the can which is connected with an outlet near the bottom of the can. It is then possible to easily connect an air supply line to the fixture at the top of the can. Probably the most generally used construction includes some form of tube, usually of brass, which is soldered to the side Wall of the can, sometimes interiorly in a corner of the can or in a groove formed in one of the walls and sometimes exteriorly in a groove or in some other manner.

The rough handling of these freezing cans which contain usually at least three hundred pounds of water requires that any air tube be protected from external injury, while the action of the water as it freezes, as well as the removal of the ice cake, requires that the tube be protected from internal injury.

It is an object of the present invention to provide an air tube, and to so construct the fre see t the t be a d an m be Specification of Letters Patent.

Patented Dec. 6, 1921.

1921. Serial No. 469,883.

permanently associated in a way to protect the tube from injury.

A preferred embodiment of the invention has been selected for purposes of illustration and description and is shown in the accompanying drawing, wherein- Figure'lis a perspective view of afreezing can-embodying a preferred form of the invention.

Fig. 2 is an enlarged detail perspective view looking into the corner of the can.

Fig. 3 is a cross-section through one corner of the can, and

Fig. 4 is a detail view of the tube section.

The freezing can shown in the accompanying drawing may be made in accordance with Letters Patent No. 1,027,802, dated May 28, 1912, in so far as the general construction, its side walls and bottom, and the formation of seams, are concerned. The can shown comprises two pieces of galvanized sheet metal, one of which forms the side wall 1 and the end wall 2, while the other forms the side wall 3 and the end Wall 4. A third piece of sheet metal is suitably cut to form the bottom 5 of the can. The side walls may, if desired, be formed with grooves 6 in order to stiffen them. A reinforcing band 7 may be riveted around the top of the can.

The freezing can thus far described is a type of can which is made in large numbers and only a very slight departure from the regular construction is necessary in order to equip it with the air tube hereinafter described. It will be noted that the two wall sections of the can are riveted together and form seams extending vertically at diagonally opposite corners.

Fig. 4 of the drawings shows what may be called the tube section 8. This section consists of a strip of sheet metal which has been folded upon itself to form a substantially circular air passage in the fold. The resulting structure consists in a tube 9 and a longitudinal fin or flange 10 comprising two thicknesses of metal. The side wall sections of the can are customarily punched immediately after the plates are cut and before bending. Preferably the tube section is punched after bending, and it may be punched in such a manner that when assembled with the wall section of the can its rivet holes will center with those in the wall sections.

The tube section after folding and punchins may then be assembled with th side of the side wa ls at the seam.

which are ordinarily used to hold the side walls; the tube 9 lying in the corner and the fin 1O extendin between overlyin sections he rivets The above? described construction of the tube and can is exceedingly strong and durable- It will be observed that the'tube. may, if desired, be made from'the same material as the can itself and being as strong as the Walls of the can it will obviously last as longasthe can lasts, thus obviating the free quent renewal of brass or other similar tube which is now all too frequent. The presen-t'tube is mostsecurely fastened to the can, that is, by the fin 10 lying between and held by the rivets which hold the walls of the can together; Furthermore, the tube is located in the corner of the can where itis well protected from external injury and very unlikely to receive any injury from theinside of the can. I i

The invention may be variously modified and embodied within the scope of the subjoined claims.

What I claim as my invention is:

1. A freezing can for use in the manufacture'of ice and having an air tube extending from the top of the can to a point adjacent thebottom of the can, the said tube comprising a strip of-fsheet metalifolded longitudinally to provide an airconduit and an attaching fin extending the length of the tube,

and being secured to the can ing hrough said fin. V

Ina freezing can,an air tube comprising astripqof sheet metal folded longitudinally toprovide an air conduit and alongitudinal fin, the said fin lying between overlapping portions of adjacent wall sections and being held 'in; position by rivets passing through the wall sections and thesaid fin.

3. In a freezing can, an air tube comprising ,a strip of sheet metal folded longitudinally to provide an air conduit and a longi tudinal fin, the said fin providing attaching means, and rivets passing through said fin and overlappedwall members to hold said tube in position. In testimony whereof, I have signed my name to this specification this 11th day of May,-1921.

by rivets pass- ANSON ,J. BENTLEY, V 

